Stove or furnace



(No Model.) 2 Sheets-Sheet 1.,

G. L. RIDGWAY.

STOVE 0R FURNACE.

No. 389,904. I Patented Sept. 25, 1888.

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CHARLES L. RIDCHVAY, OF BOSTON, ll'l ASSAOHUSETTS, ASSIGNOR TO THE RIDG- "WAY FURNACE AND STOVE COMPANY, OF NASHUA, NEXV HAMPSHIRE.

STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent No. 389,904, dated September 25, 1888.

Application filed March 12. 1886. Serial No. 194,039. (No model.)

To all whom it may concern.-

Be itknown that I, CHARLES L. RIDGWAY, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States,

have invented a new and useful Improvement in Stoves or Furnaces, of which the following is a full, clear, and exact description,reference being bad to the accompanying drawings, forming a part of this specification, in describing IO its nature.

The invention is an improvement upon that which is described in United States Patent No. 281,795, issued to me July 24, 18S3,which describes a heating stove or furnace having a r 5 revolving fire-pot wall provided with vertical bars and vertical recesses or spaces, the spaces extending substantially the entire height of the wall.

My present invention relates to a fire-pot 20 wall the lower portion of which is solid or unprovided with spaces or openings to the firepot, and-the upper part of which is made up of alternate spaces and bars. This fire-pot is adapted for use in connection with a heating stove or furnace constructed substantially as described in my said patentthat is, a heating stove or furnace having a space or chamber about the fire-pot wall connected with the combustion-chamber, and, in fact, forming a part thereof, and separated from the ash-pit chamber by a substantially air-tight plate, so that the air for maintaining combustion is compelled to enter the fire-pot through the grate, and the fire is caused to burn outward from the fire-pot into its surrounding chamber as well as upward directly into the main combustion-chamber.

Referring to the drawings, Figure 1 is a central vertical section of a furnace having the features of my invention. Fig. 2 is a view in elevation of a sectional fire-pot wall. Fig. 3 is a plan View of the fire-pot wall shown in Fig. 2.. Fig. 4 is a view in perspective of a portion of a ring for fastening the upper portion of the sections of the fire-pot wall together.

Fig. 5 is a perspective view of one of the sections of the fire-pot wall.

A is the ash-pit; B, the lire-pot; G, the tirepot wall; D, the chamber about the fire-pot,

which is connected with the combustion-chamher D.

d is the casing or shell which forms the combustion-chamber and the chamber D. E is the partition-platebetween the chamber D and the ash-pit.

The fire-pot wall 0 may be made integral-- that is, of one castingor it may be made of several sections, and I prefer the latter construction; but however it is made the complete fire-pot wall will have thelower portion or section, 0, continuous or solid throughout, in that it has no spaces extending to the fire-pot interior or fuel-chamber, and the upper p0rtion or section, a, which is made up of the bars 0 and the spaces or recesses 0 between them. The solid portions or sections may comprise substantially a little more or less than one-half the fire-pot wall.

To secure the fire-pot wall in place when made in sections, I prefer the construction shown in the drawings-that is, a construction employing the partition-plate E, havinga recess, e, for receiving the lower extremities of the assembled sections, and a fire-pot ring or cylindrical piece, F, which is received within the fire-pot wall and upon the shoulder f of the same.

The fire-pot wall may be stationary or nonrevoluble, or the partition-plate already described, within a recess of which it is received, may be revoluble and adapted to carry the firepot wall with it in its rotation, as in my former patent above referred to. Any suitable grate may be used in connection with the annular or cylindrical wall to furnish the bottom of the fire-pot. I prefer that the vertical bars be connected at their upper ends by a horizontal cross-bar, c". The assembled sections are held together at their tops by means of the holding-ring G, having the annular de- 0 pending flange g, which engages the innersurface of the sections, and the hooks g, which engage the outwardly-projecting pins 9 of the sections.

' The chamber D, which encircles the fire-pot 5 wall, does not receive air for the support of combustion. It has no connection with the outer air, and it opens into the combustionchamber. Consequently the volatile products of combustion pass in part outward from the fire-pot into the upper part of this chamber 1), and thence to the combustion-chamber D, the air for the support of combustion passing from the ash-pit upwardly through the grate.

In the patent referred to, I have shown a fire-pot having openings which extend substantially its entire length; but I have found that for certain purposes it is desirable that the openings shall not extend so far, because by making the bars and their intermediate openings shorter the fire-pot wall is made stronger, and its parts are less liable to be warped or bent when subjected to a high degree of heat. Neither the flanged and hooked securing-ring, the recessed supporting and securing annular plate, a series of sections which are each provided with an outwardlyprojecting pin, nor a lire-pot wall which is composed of vertical sections, each of which is in part solid and in part grated, is herein broadly claimed, the first three of these being shown in application Serial No. 172,750, filed by me in the United States Patent Office J nly 27, 1885, and the fourth being shown in application Serial No. 194,938, filed by me in the United States Patent Oflice March 12, 1886.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- 1. 111 a stove or furnace, the combination of the casing (l, and the plate E, forming the chamber 1) about the fire-pot wall, and which opens into the combustion-ehamber l), with the fire-pot wall, having the llllDCl'fOliIt-O lower section, a, and upper section, 0, having alternating bars 0 and openings or spaces 0, substantially as described.

2. A fire-pot for StOXGS or furnaces, having the partition-plate E, provided with a recess in which the lower ends of the sections of the fire-pot rest, the sections of the fire-pot wall 0, having the solid or imperforatc lower portion or section 0, and the upper section, 0', formed of the bars 0, separated from each other to provide spaces or openings 0", the fire-pot ring F, placed within the fire-pot wall to hold the lower ends of the sections in place, and the holding-piece or securing'ring G, for holding the upper ends of the sections together, substantially as described.

3. A cylindrical or substantially-cylindrical fire-pot wall the lower one-half of which is solid or imperforate and the upper one-half of which is vertically barred 0r grated, in combination with the wall of a combustionchamber, and with a supporting-plate which closes the lower extremity of the spaces between the firepot wall and the wall of the combustion-chamber, substantially as and for the purposes set forth.

OIIARLES L. RIDG \VAY.

Vv'itnesses:

J. M. DOLAN, FRED. B. DOLAN. 

